TMPG 2pass misses target-bitrate

[WarpEnterprises]

I'm using TMPG 2.53 plus and normally when using 2pass the average bitrate it gives is quite close to the setting made.
Recently I made some DVD rips using DVD2AVI and its VFAPI-interface.
(MPEG2, SVCD-standart)
The results are strange: 1600kbit gives exactly 1600, 1550 gives 1500, 1500 gives 1400, and so on. More curious, one movie doesn't show this, two others show this behaviour.
Is there anybody else who sees this effect? It never showed up in AVI->MPEG conversions.
How exact are your kbit-results??

[mrtristan]

Sorry, this is a little off topic.

Is Tmpgenc Plus any faster than the free version? I'm thinking about purchasing a copy, if so.

[WarpEnterprises]

No, it's not faster, the only noticeable but quite important difference is a distinct new 2pass-encoding (with the above mentioned errors at least on my system)

[ninja.rogue]

Sorry, WarpEnterprises, but you are wrong.
Tmpgenc 2.54 IS faster than its predecessors, and ONLY in 2-pass VBR, due to the fact that it now has the option to set a hard-disk caching method for multipass encoding.
This shortens encoding times ONLY in 2-pass VBR from 20% to 40% and more.
Just try and have a look at this improvement.
Cheers
Ninja.rogue

[WarpEnterprises]

@ninja.rogue: You're right and I'm too - I was talking about 2.53plus.
But what about my observed bitrates??